Frequency stabilization of 3.5-THz and 4.7-THz quantum-cascade lasers by a phase-locked loop

Heiko Richter; Nick Rothbart; Martin Wienold; X Lu; Lutz Schrottke; Divya Jayasankar; Vladimir Drakinskiy; Mats Myremark; Jan Stake; Peter Sobis; Anders Emrich; Heinz-Wilhelm Hübers

Frequency stabilization of 3.5-THz and 4.7-THz quantum-cascade lasers by a phase-locked loop
Paper i proceeding, 2022

We report on a phase-locked loop for quantum-cascade lasers operating at 3.5 and 4.7 THz. These frequencies are particularly relevant in atmospheric science and astronomy. The QCLs are locked to the multiplied output of a frequency synthesizer using a Schottky diode harmonic mixer. The resulting linewidths are in the order of a few Hz.

terahertz

frequency stabilization

phase-locked loop

quantum-cascade laser

Författare

Heiko Richter

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Nick Rothbart

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Martin Wienold

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

X Lu

Forschungsverbund Berlin E.V.